/Engine/Source/Runtime/Foliage/Public/ProceduralFoliageTile.h
Note also that, barring any core changes to the ordering ofTSet, foliage generation is deterministic (i.e. given the same inputs, the result of the simulation will always be the same).
class UProceduralFoliageTile : public [UObject](API\Runtime\CoreUObject\UObject\UObject)